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Thanks PEDARRIN2 - perfect just what I was looking for.

I design medium pressure (5-85 psi) distribution gas lines at industrial facilities, following CSA Z662 and B149.1. The scope is usually from pressure reducing station to 10-15 feet from the buidling of the end user (upstream of PRV). Typically the sizing is below 10" and I used MDPE or HPDE...

Great - thanks

Looking for some help on definition terminology. In a document on laterite roads the following data is presented Base properties PI = 15, P425 = 48; PM = 720 CBRs @ 98% BS Heavy = 24% Cum. Traffic to end 2003 = 0.28 MESA My question - 1) P425 represent a fraction but on what scale. is this...

I'm assuming in-place volumes with no account for bulking.

I'm studying for my PE exam in Geotechnical Materials and Analysis and have come across a problem that I seem to be able to do the first part but a bit confused on the second. The abridged question is this Need to fill a volume of 2100 m3 using material to be taken from one of two borrow pits...

Bimr Thanks for the reference - excellent. FYI this is mine site in northern Saskatchwan - I said potable but actualy for a process use routed inside a building. Thanks to everyone. Closing out this thread.

I have a design for a potable water system using pvc sched 40 solvent welded pipe. ASME B31.3 page 104 A345.4.2 reference test pressure of 1.5 times design pressure. Design pressure is about 100 psi based on the pump supply curve. The downstream distribution system has pressure reducers as...

I've been in civil engineering for 20+ years and during that time have danced around water/wastewater treatment and general infrastructure. I'm both impressed and jealous of the water treatment knowledge some of the posters on this website. Having recently started to gravitate to more water...

Greetings Based on the following equation taken from Water Treatment - Principles and Design (2nd Edition) 4Fe(HCO3)2 + O2 + H2O >>> 4Fe(OH)3 + 8CO2 I'm trying to figure out how Alkalinity used (mg/ mg Fe) of 1.8 was calculated. I can see how oxidant needed of 0.14 mg/mg Fe was calculated...

Greetings Based on the following equation taken from Water Treatment - Principles and Design (2nd Edition) 4Fe(HCO3)2 + O2 + H2O >>> 4Fe(OH)3 + 8CO2 I'm trying to figure out how Alkalinity used (mg/ mg Fe) of 1.8 was calculated. I can see how oxidant needed of 0.14 mg/mg Fe was calculated...

dcasto interesting. I decided to do the same thing with my performance spec, leave the O2 rates the same as water at the design temperature. Who manufactured your system. I'm having problems finding bidders for this type of de-aerator. Most vendors want to use a thermal de-aerator which has...

Gents I think I upload my brine doc correctly. http://files.engineering.com/getfile.aspx?folder=61f06376-0f36-4603-bfd7-53df01e98b40&file=Sol_O2_in_Dead_Sea_Brine.pdfhttp://files.engineering.com/getfile.aspx?folder=61f06376-0f36-4603-bfd7-53df01e98b40&file=Sol_O2_in_Dead_Sea_Brine.pdf

zdas I have a pdf document by Nishri and Yaakov on Dead sea brine. where do you want me to send it?

Gents, thank you for your comments. gerhardl (Mechanical) At this stage I was looking for some theoretical values. zdas04 (Mechanical) my brine source is from a solution mining stream for KCl and NaCl. I'm looking at de-oxyenating it using a vacuum deaerator driven by steam (rather then...

Are the O2 levels in brine lower then those in fresh water at a given temperature simply because the increased TDS of the brine prevents more oxygen from binding to other molecules? Kevin

50hz at 1495rpm

I'm looking for decibel ratings for NEMA motors to compare a 600 kw tefc to WP1 enclosure. If NEMA has a maximum rating for all motors that would be fine as well. For those needing more information on why I'm asking. Its for a pumping station design where I think 600kw tefc will be too...

thanks mbeychok I'll try that

I have two produced water streams (2500 and 8500 gpm) containing oil which has been previously de-aerated to remove oxygen. The water is reused in the process after passing through the oil separator and to avoid having to de-aerate the streams again I was looking for a manufacturer of API oil...